Question : How to integrate paypal with mysql inventory

I am trying to make a e-commerce site. I have the inventory stored in a MySql database. and I want to use paypal to process the payment. Once the payment clears I want to have the item number and the quantity sold sent back to me from paypal. that way I can use the MySql database and subtract the amount sold from the inventory. I would like to use paypal's cart if possible.
I use PHP to program in.
Thanks.

Answer : How to integrate paypal with mysql inventory

Hello

You need to implement Paypal IPN or Pro method to get instant payment notification.. Have you developed something which is not working or giving issue to look into ?